<template>
  <div :class="className" :style="{height:height,width:width}"/>
</template>

<script>
import * as echarts from 'echarts'

require('echarts/theme/macarons') // echarts theme
import resize from './mixins/resize'

const animationDuration = 6000

export default {
  mixins: [resize],
  props: {
    className: {
      type: String,
      default: 'chart'
    },
    width: {
      type: String,
      default: '100%'
    },
    height: {
      type: String,
      default: '350px'
    },
    chartData: {
      type: Object,
      required: true
    }
  },
  data() {
    return {
      chart: null
    }
  },
  mounted() {
    this.$nextTick(() => {
      this.initChart()
    })
  },
  beforeDestroy() {
    if (!this.chart) {
      return
    }
    this.chart.dispose()
    this.chart = null
  },
  methods: {
    initChart() {
      this.chart = echarts.init(this.$el, 'macarons')
      this.setOptions(this.chartData)
    },
    setOptions({titleData, barChartData} = {}) {
      this.chart.setOption({
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'shadow'
          }
        },
        xAxis: {
          type: 'category',
          data: titleData,
          axisLabel: {
            fontSize: 12,
            interval: 0,
            rotate: 20
          },
        },
        yAxis: {
          type: 'value'
        },
        series: [
          {
            data: barChartData,
            type: 'bar',
            label: {
              show: true,
              position: 'inside',
              formatter: '{c}',
            },
            sort: 'descending'
          }
        ]
      })
    }
  },
  watch: {
    chartData: {
      deep: true,
      handler(val) {
        this.setOptions(val)
      }
    }
  },
}
</script>
